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OpenStudy (anonymous):
Solve for x: sin2x = cosx
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OpenStudy (anonymous):
sin2x=2sinxcosx so, you have: 2sinxcosx=cosx, now divide both sides by cosx and get: 2sinx=1, then divide both sides by 2 and get: sinx=1/2, now the angle that corresponds to this is a 30 degree angle
OpenStudy (anonymous):
thanks so much.
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